Plow-point.



No. 820,035. PATENTED MAY s, 1906.

J. L. BRINLY.

PLOW POINT. uruonmn FILED SEPT. 11, 1005.

. tion, Serial No. 209,248, file UNITED sTATEs JOHN L. BRINLY, or

PATENT OFFICE.

LOUISVILLE, KENTUCKY, ASSIGNOR TO BRINLY- KENTUCKY.

No. 820,035. Original applicationfiled May 23,1904, $eria1N0-209,248.

To all whom it may concern:

Be it known that I, JOHN L. BRINLY, a citizen of the United States, residing at Louisville, in the county of Jefferson and State of Kentucky, have invented certain new and useful Improvements in Plow Points, of which the following is a specification.

My invention relates to improvements in plow-points, and especially to im rovements upon the plow-point shown and escribed in the patent to Thomas E. O. B;inly, No. 494,458, dated March 28, 1893, this application being a division of my ending applica- (T May 23, 1904..

The general object of my invention is to provide an improved plow-point wherein the top rib is of material similar to that of the plate itselfthat is, high-grade steel. By my improved article I am enabled to avoid the welding of a separate rib to the plate, and by avoiding this welding the article is strengthened and made materially stronger.

The specfic ob ect of my invention is to produce a plow-point which is more adapted to general hard use by its construction and one which saves a great amount of labor in the manufacture thereof. There is in this article a marked improvement in the wearing qualities over plow-p oints previously in use.

It has been found that great difficulty arises with plowoints previously in 'use where the rib is of ifferent material from the plate to which it is welded in that the rib often becomes loose and the parts become disorganized. It is very essential that the side portion of the point, particularly that portion formed at the juncture of the rib and plate, be formed with a fiat surface; but in forming the article from an integral plate by bending any portion thereof there is necessarily formed a curved surface at the point where the bend occurs. In my improved article I have strengthened the plate by a rib bent from the integral plate and have formed the edge of the plate with a flat surface at the point where the bending occurs.

My invention consists in the constructions and combinations of parts hereinafter described, and set forth in the claim.

In the accompanying drawings, which form a part of this specification, Figure 1 represents the blank from which the plate and top rib are formed. Fig. 2 is a perspective Specification of Letters Patent.

Divided and this application filed September 11,1905. Serial No. 2 77 ,84'7- PLOW-POINT.

Patented May 8, 1906.

view of the lip. Fig. 3 is a perspective view of the blank after the first bending operation. Fig. 3 is a section on the line a: w of Fig. 3. Fig. 4 is a view after the second bending operation. Fig. 4 is a section on the line y y of Fig. 4. Fig. 5 is a view of the piece after having been shaped up by the bulldozer, triphamrner, or by hand. Fig. 5 is a section on the line .2 z of Fig. 5. Fig. 6 is a perspective view of the completed point.

Like parts are represented by sintilar characters of reference in the several views.

In the said drawings, Fig. 1 shows the blank from which the point is formed, the

said blank being of polygonal shape. The

ortion a, is the plate of the finished product, Sis the rib, and the portion (1, projecting from the base of the blank, forms the toe of the oint. The blank shown in this figure is heated and bent along the dotted line by a process technically known as bulldozing, although it can be done by various forms of mechanism. The first bending step, as just explained, is so arranged that the blank will assume the shape shown in Fig. 3 and in section in Fig. 3*. portion 1) is bent past the center-that is, through more than ninety degreesand this feature is im ortant by reason of the fact that the portion must be bent upon the portion a, so that it will lie in a plane parallel with the ortion a, and by reason of bending the portlon b past the center said portion 1) in the next step of the operation can be readily bent into the position shown in section in Fig. 4*,

while the portion awill be readily held against strains. Necessarily in operating upon plates of high-grade steel there would be great difficulty in bending the portion 1) by two succes- It will be observed that the sive operations into the position shown in section in Fig. 4 unless the plate was initially formed of the shape shown in Fig. 1 with the portion 1) formed as shown therein, and then initially bending the portion 1) ast the center, as heretofore explained. ter the second bending operation the piece is dished, as shown in Fig. 5, and the rounded edge I) of Figs. 4 and 4 is flattened, as at b in Figs. 5

and 5 and the square edge 6 of Figs. 4 and 4 is beveled, as at b, Fig. 5 The lip c, as indicated in dotted lines in Fig. 5' and also shown in Figs. 2 and 6, is then attached by welding. The plow-point is completed by adding the hole a, as shown in Fig. 6, whereby the point is attached to the standard and by the end of the rib being drawn out and shaped, as at 6 In use the parts are arranged as follows: The bent portion of the plate constituting the rib lies substantially in a plane parallel with the surface of the plate a and is called the operating-surface of the rib. This rib is upon the upper side of the plow-point. The lip c is formed, as shown clearly in Fig. 2, and secured to the plate in the position indicated in Fig. 5, such that the lower surface of the lip comprises the bottom of the point, and the extreme forward edge of the lip lies flush with the surface of the plate. It will be seen that by this construction the edges of the rib are all substantially flush with adjacent edges of the plate, and the plow-point rides upon the bottom of the lip c, the article being shown in a novel arrangement of parts.

It will thus be seen that I am enabled to form from high-grade steel a plow-point in which the plate and the top rib are integral without subjecting such high-grade steel to such a heat as would be necessary to make a perfect Weld of a separate plate and top rib, that the construction is economical, and that the plow-point by the use of the high-grade material thus permitted will possess great strength and better wearing qualities than those heretofore produced.

Having thus described -my invention, I claim As an article of manufacture, a low-point comprising a rib and plate formed integrally from a single piece, a portion of the operating-surface of the rib being above and substantially parallel. with the surface of the plate, a lip formed from a separate piece secured to the plate below the rib portion and forming the bottom of the point, the sides of the lip and rib being substantially flush and together constituting the landside of the point, substantially as specified.

In testimony whereof I have hereunto set my hand this 7th day of September, A. D.

JOHN L. BRINLY. Witnesses:

HERBERT LOUGHRIDGE, A. H. ROBINSON. 

